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	<h1 id="firstHeading" class="firstHeading" lang="en">Hugin Control Points table</h1>
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		<div id="siteSub" class="noprint">From PanoTools.org Wiki</div>
		
		
		
		
		
		
		<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-parser-output"><p>The <a href="Hugin.html" title="Hugin">hugin</a> Control Points table is an optional pop-up window listing all the <a href="Control_points.html" title="Control points">control points</a>
in the project, whereas the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">hugin Control Points tab</a> shows only those points joining a pair of images.
</p><p>The list of points can be sorted by clicking on one of the column titles, clicking twice will reverse the sort:
</p>
<ul><li><b>G CP#</b>, the global (project-wide) index number of the control point pair, deleting points will renumber the list.</li>
<li><b>Left Img.</b>, the index number of the first image in the pair (<i>left/right</i> has no significance except that this is the order they are shown in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">hugin Control Points tab</a>).</li>
<li><b>Right Img.</b>, the index number of the second image in the pair.</li>
<li><b>P CP#</b>, the local index number (of two images shown in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">Hugin Control Points tab</a>) of the control point pair, deleting points will renumber the list.</li>
<li><b>Alignment</b>, the type of control point, these can be normal control points, <a href="Horizontal_control_points.html" title="Horizontal control points">horizontal control points</a>, <a href="Vertical_control_points.html" title="Vertical control points">vertical control points</a> or <a href="Straight_line_control_points.html" title="Straight line control points">straight line control points</a>.</li>
<li><b>Distance</b>, the distance in pixels between a perfect alignment and the actual alignment achieved by the optimiser.  Otherwise, after selecting <b>Fine-tune all Points</b> from the <b>Edit</b> menu, this column shows the correlation between the points (0.0 indicates no correlation and 1.00 indicates 100% correlation) - Typically values over 0.8 show that the image areas around each point of the pair are very similar (an 80% correlation).</li></ul>
<p>Selecting a row in the table will display the relevant pair of images in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">hugin Control Points tab</a> and highlight
the control point in red.
</p><p>Clicking <b>delete</b> will remove any selected points/rows from the project.
</p><p>You can select more than one row by holding down the <b>Ctrl</b> key and picking extra rows, similarly you
can select a range of rows with the <b>Shift</b> key.
</p><p>Clicking <b>Select by Distance</b> allows you to select all the points depending on the value in the <b>Distance</b> column, eg:
</p>
<ul><li>Enter <i>10</i> to select all the points with an optimiser error <i>greater than</i> ten pixels.</li>
<li>Enter <i>-5</i> to select all points with an optimiser error <i>less than</i> five pixels.</li>
<li>Enter <i>-0.8</i> to select all points with a fine-tune correlation <i>less than</i> 80%.</li></ul>

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